Parker the way I did mine was with a video camera and then I just took frame by frame and merged it all together in photoshop another way to do it is have a camera that shoots fast fps and merge that together also in photoshop but I think the video worked 10x better

As far as difficulty actually piecing it together, you do need to know what your doing cause it is pretty hard with all the different layers, cutting ,erasing , patching, stamping, and detailing the photo but im sure there is a tutorial on youtube or something that can help you through it if you ever wanted to attempt doing one yourself or if you want help Id be happy to do it for you have you have a video of you doing a trick and the camera is focused on that one spot or barely moves during the trick. Let me know! ( that goes for anyone else too )

The horizon is uneven , this was actually kinda of before i touched it up a bit here is a little more updated one ...
And I just did one of a backroll last night, but besides the trick that isnt good enough, I just though it was cool in general lol...

that's all i got cause i kept saving it throughout the process not really thinking about the "original" without the vignette effect on it. i like pictures like that a lot so that's why i chose to go that route. i feel like it makes the image "pop" a little more (the lighting was really dark so it doesn't really "pop" that well to begin with) rather than having the edges as bright as the center where i wanted the focus to be. that's just my personal preference so to each his own